Merge #18905: travis: Remove s390x

8c705ff1291ef7876ab1a939e2c7312aacc3dc37 travis: Remove s390x (MarcoFalke)

Pull request description:

  Fixes #18868
  Fixes #18016

Top commit has no ACKs.

Tree-SHA512: 1007b761c7e01dd2b75aa34e92e01a92a84a100c0a3a53863c755d93b2438a74601e3f2083919b8a9cfc92fb104d0c8415fad3f6c9504c76b02ad2e9712660c0

.travis.yml

@@ -209,26 +209,6 @@ after_success:
         FILE_ENV="./ci/test/00_setup_env_arm.sh"
         QEMU_USER_CMD=""
 
-    - stage: test
-      name: 's390x native BE [GOAL: install] [bionic] [no depends, no GUI]'
-      arch: s390x
-      dist: bionic
-      addons:
-        apt:
-          packages:
-            - bsdmainutils
-            - libboost-filesystem-dev
-            - libboost-system-dev
-            - libboost-test-dev
-            - libboost-thread-dev
-            - libdb++-dev
-            - libdb-dev
-            - libevent-dev
-      env: >-
-        DANGER_RUN_CI_ON_HOST=true
-        CI_USE_APT_INSTALL=no
-        FILE_ENV="./ci/test/00_setup_env_s390x_host.sh"
-
 # s390 build was disabled temporarily because of disk space issues on the Travis VM
 #
 #    - stage: test

ci/test/00_setup_env_s390x_host.sh

@@ -1,14 +0,0 @@
-#!/usr/bin/env bash
-#
-# Copyright (c) 2019-2020 The Bitcoin Core developers
-# Distributed under the MIT software license, see the accompanying
-# file COPYING or http://www.opensource.org/licenses/mit-license.php.
-
-export LC_ALL=C.UTF-8
-
-export HOST=s390x-linux-gnu
-export NO_DEPENDS=1
-export BITCOIN_CONFIG="--with-incompatible-bdb --enable-reduce-exports"
-export RUN_UNIT_TESTS=true
-export RUN_FUNCTIONAL_TESTS=true
-export GOAL="install"